Chemistry Final Exam Worksheets (Page 5 of 9) in pdf

Chemistry Final Exam Worksheets Page 5

39. Calcium has an atomic number of 20. How many filled energy levels does it have? How many electrons are left

over?

40. Why are Noble Gases considered non-reactive?

41. What do scientists call the place where electrons are found? ___________________________

42. What are the benefits of the following elements?

Chlorine:

Fluorine:

Aluminum:

43. What are the only two elements that are liquid at room temperature? ______________________________

44. Identify where on the periodic table these families are found, their valence electrons and their oxidation

numbers:

Halogens: ______________________________________________________________________________

__________________________________________________________________________________ _____

Alkali metals: ___________________________________________________________________________

_______________________________________________________________________________________

Alkaline Earth Metals: ____________________________________________________________________

_______________________________________________________________________________________

Noble Gases: ________________________________________________________________________

__________________________________________________________________________________________

45. As you move from left to right across the periodic table, what happens to the mass and size of the elements?

46. The ________ ________ of an element is the total number of protons and neutrons in the nucleus.

47. Fill in the following chart.

Atomic Number

Protons

Neutrons

Mass

Electrons

-1

48. Elements with similar properties are listed in a single column on the periodic table called ______________.

49. Be able to name the discoveries of the following scientists:

a. Bohr: _____________________________________________________________________

b. Dalton: _____________________________________________________________________

c. Democritus: _____________________________________________________________________

d. Rutherford: _____________________________________________________________________

Chemistry Final Exam Worksheets Page 5